Medical shaver with multi-blade

Abstract

A multi-blade for a medical shaver includes an outer blade and an inner blade. The outer blade includes a keyhole through which at least a portion of the inner blade is exposed. The keyhole includes a first set of corresponding cutting edges on a first side of the outer blade and the inner blade, and a second set of corresponding cutting edges on a second side of the outer blade and the inner blade. Rotation of the inner blade in a first direction removes a first amount of tissue from a patient with the first set of cutting edges. Rotation of the inner blade in a second, different direction removes a second, different amount of tissue from the patient with the second set of cutting edges.

What is claimed is: 
     
         1 . A multi-blade for a medical shaver, comprising:
 an outer blade including one or more walls defining an interior cavity, wherein the outer blade includes a keyhole in the one or more walls at a distal end of the multi-blade; and   an inner blade housed within the interior cavity, wherein the inner blade is operable to rotate relative to the outer blade, and wherein at least a portion of the inner blade is exposed via the keyhole,   wherein a first side of the keyhole includes a first cutting edge on the outer blade and a corresponding first cutting edge on the inner blade,   wherein a second side of the keyhole includes a second cutting edge on the outer blade and a corresponding second cutting edge on the inner blade, and   wherein the second cutting edge is different from the first cutting edge.   
     
     
         2 . The multi-blade of  claim 1 , wherein rotation of the inner blade in a first direction causes the first cutting edge on the outer blade and the corresponding first cutting edge on the inner blade to engage and remove a first amount of tissue from a patient, and wherein rotation of the inner blade in a second, different direction causes the second cutting edge on the outer blade and the corresponding second cutting edge on the inner blade to engage and remove a second, different amount of tissue from the patient. 
     
     
         3 . The multi-blade of  claim 2 , wherein the first cutting edges of the outer blade and the inner blade are each an aggressive cut, wherein the second cutting edges of the outer blade and the inner blade are each a smooth cut, and wherein the first amount of tissue removed is greater than the second amount of tissue removed via rotation of the inner blade. 
     
     
         4 . The multi-blade of  claim 3 , wherein the first cutting edges of the outer blade and the inner blade are each a smooth cut, wherein the second cutting edges of the outer blade and the inner blade are each an aggressive cut, and wherein the first amount of tissue removed is less than the second amount of tissue removed via rotation of the inner blade. 
     
     
         5 . The multi-blade of  claim 1 , wherein at least one of the first cutting edge of the outer blade and the first cutting edge of the inner blade on the first side of the keyhole is an aggressive cut, and wherein at least one of the second cutting edge of the outer blade and the second cutting edge of the inner blade on the second side of the keyhole is a smooth cut. 
     
     
         6 . The multi-blade of  claim 1 , wherein at least one of the first cutting edge of the outer blade and the first cutting edge of the inner blade on the first side of the keyhole is a smooth cut, and wherein at least one of the second cutting edge of the outer blade and the second cutting edge of the inner blade on the second side of the keyhole is an aggressive cut. 
     
     
         7 . The multi-blade of  claim 1 , the multi-blade further comprising one or more bends along a length of the multi-blade between the distal end and a proximal end of the multi-blade. 
     
     
         8 . The multi-blade of  claim 1 , the multi-blade further comprising a blade end at a proximal end of the multi-blade, wherein the blade end is couplable to a distal end of a shaver handpiece of the medical shaver. 
     
     
         9 . The multi-blade of  claim 8 , wherein the outer blade is fixed in position or is capable of being manually rotated relative to the shaver handpiece of the medical shaver via the blade end, and wherein the inner blade is operable to rotate relative to the shaver handpiece of the medical shaver via a transfer of rotational motion through the blade end. 
     
     
         10 . A medical shaver, comprising:
 a multi-blade, the multi-blade comprising:
 an outer blade including one or more walls defining an interior cavity, wherein the outer blade includes a keyhole in the one or more walls at a distal end of the multi-blade; and 
 an inner blade housed within the interior cavity, wherein the inner blade is operable to rotate relative to the outer blade, and wherein at least a portion of the inner blade is exposed via the keyhole, 
 wherein a first side of the keyhole includes a first cutting edge on the outer blade and a corresponding first cutting edge on the inner blade, 
 wherein a second side of the keyhole includes a second cutting edge on the outer blade and a corresponding second cutting edge on the inner blade, and 
 wherein the second cutting edge is different from the first cutting edge; and 
   a shaver handpiece comprising a body and a coupling mechanism at a distal end of the shaver handpiece,   wherein a proximal end of the multi-blade is insertable into the coupling mechanism and securable to the shaver handpiece via the coupling mechanism.   
     
     
         11 . The medical shaver of  claim 10 , wherein the multi-blade further comprises a blade end at the proximal end of the multi-blade, wherein the blade end is insertable into the coupling mechanism to secure the multi-blade to the shaver handpiece. 
     
     
         12 . The medical shaver of  claim 10 , wherein the outer blade is fixed in position or is capable of being manually rotated relative to the shaver handpiece of the medical shaver via the blade end, and wherein the inner blade is operable to rotate relative to the shaver handpiece of the medical shaver via a transfer of rotational motion through the blade end. 
     
     
         13 . The medical shaver of  claim 10 , wherein rotation of the inner blade in a first direction causes the first cutting edge on the outer blade and the corresponding first cutting edge on the inner blade to engage and remove a first amount of tissue from a patient, and wherein rotation of the inner blade in a second, different direction causes the second cutting edge on the outer blade and the corresponding second cutting edge on the inner blade to engage and remove a second, different amount of tissue from the patient. 
     
     
         14 . The medical shaver of  claim 13 , wherein the first cutting edges of the outer blade and the inner blade are each an aggressive cut, wherein the second cutting edges of the outer blade and the inner blade are each a smooth cut, and wherein the first amount of tissue removed is greater than the second amount of tissue removed via rotation of the inner blade. 
     
     
         15 . The medical shaver of  claim 13 , wherein the interior cavity defined by the one or more walls of the outer blade is operable to collect one or more of the removed first amount of tissue or the removed second amount of tissue. 
     
     
         16 . The medical shaver of  claim 15 , wherein the first amount of tissue and/or the second amount of tissue collected within the interior cavity is removable from the multi-blade via application of a suction force provided through the multi-blade. 
     
     
         17 . A medical shaver system, comprising:
 a medical shaver, the medical shaver comprising:
 a multi-blade, the multi-blade comprising:
 an outer blade including one or more walls defining an interior cavity, 
 
 wherein the outer blade includes a keyhole in the one or more walls at a distal end of the multi-blade; and
 an inner blade housed within the interior cavity, wherein the inner blade is operable to rotate relative to the outer blade, and wherein at least a portion of the inner blade is exposed via the keyhole, 
 wherein a first side of the keyhole includes a first cutting edge on the outer blade and a corresponding first cutting edge on the inner blade, 
 wherein a second side of the keyhole includes a second cutting edge on the outer blade and a corresponding second cutting edge on the inner blade, and 
 wherein the second cutting edge is different from the first cutting edge; and 
 
 a shaver handpiece comprising a body and a coupling mechanism at a distal end of the shaver handpiece, 
 wherein a proximal end of the multi-blade is insertable into the coupling mechanism and securable to the shaver handpiece via the coupling mechanism; and 
   a control system in communication with the medical shaver, wherein the control system is operable to display at least one of direction of rotation and speed of rotation of the inner blade.   
     
     
         18 . The medical shaver system of  claim 17 , wherein the at least one of direction of rotation and speed of rotation of the inner blade is controllable via at least one of one or more user inputs on the control system and one or more toggles on the shaver handpiece. 
     
     
         19 . The medical shaver system of  claim 18 , wherein activation of a first user input on the control system or a first toggle on the shaver handpiece causes the inner blade to rotate in a first direction, and wherein activation of a second user input on the control system or a second toggle on the shaver handpiece causes the inner blade to rotate in a second, different direction. 
     
     
         20 . The medical shaver system of  claim 17 , wherein rotation of the inner blade in a first direction causes the first cutting edge on the outer blade and the corresponding first cutting edge on the inner blade to engage and remove a first amount of tissue from a patient, and wherein rotation of the inner blade in a second, different direction causes the second cutting edge on the outer blade and the corresponding second cutting edge on the inner blade to engage and remove a second, different amount of tissue from the patient.